CN115940839A - Amplifying circuit, wireless communication module, and electronic device - Google Patents
Amplifying circuit, wireless communication module, and electronic device Download PDFInfo
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- CN115940839A CN115940839A CN202211576477.5A CN202211576477A CN115940839A CN 115940839 A CN115940839 A CN 115940839A CN 202211576477 A CN202211576477 A CN 202211576477A CN 115940839 A CN115940839 A CN 115940839A
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Abstract
The application discloses amplifier circuit, wireless communication module and electronic equipment, wherein amplifier circuit includes: the device comprises a differential conversion module, a differential combination module, a first matching network and two Doherty branches; the input end of the differential conversion module is used for accessing an initial signal, the first output end of the differential conversion module is connected with the first input end of the differential combination module through one doherty branch, the second output end of the differential conversion module is connected with the second input end of the differential combination module through the other doherty branch, and the output end of the differential combination module is connected with the input end of the first matching network. The working bandwidth of the whole amplifying circuit can be expanded, and the working performance of the amplifying circuit is improved.
Description
Technical Field
The application relates to the technical field of integrated circuits, in particular to an amplifying circuit, a wireless communication module and electronic equipment.
Background
Doherty (Doherty) power amplifiers have the advantage of maintaining a linear operating mode on the basis of improving amplifier efficiency, and are widely applied to wireless communication devices such as routers. The inventor researches and discovers that the working bandwidth of the traditional doherty power amplifier has limitation and is easy to influence the working effect of the doherty power amplifier.
Disclosure of Invention
In view of this, the present application provides an amplifying circuit, a wireless communication module and an electronic device, so as to solve the technical problems that the operating bandwidth of the traditional doherty power amplifier is limited and the operating effect of the doherty power amplifier is easily affected.
The application provides an amplifying circuit, which comprises a differential conversion module, a differential combining module, a first matching network and two Doherty branches;
the input end of the differential conversion module is used for accessing an initial signal, the first output end of the differential conversion module is connected with the first input end of the differential combination module through one doherty branch, the second output end of the differential conversion module is connected with the second input end of the differential combination module through the other doherty branch, and the output end of the differential combination module is connected with the input end of the first matching network;
the differential conversion module is used for carrying out differential processing on the initial signals to obtain two paths of differential signals;
the Doherty branch is used for accessing a path of differential signal, amplifying the differential signal and outputting a corresponding initial amplification signal;
the differential combining module is used for carrying out differential combining processing on each path of initial amplification signal to obtain a combined signal;
the first matching network is used for carrying out impedance matching processing on the combined signal.
Optionally, the differential conversion module comprises a first balun converter; the first input end of the first balun converter is used for being connected with an initial signal, the second input end of the first balun converter is grounded, the first output end of the first balun converter is connected with the input end of one Doherty branch, and the second output end of the first balun converter is connected with the input end of the other Doherty branch.
Optionally, the differential combining module includes a second balun; the first input end of the second balun converter is connected with the output end of one Doherty branch, the second input end of the second balun converter is connected with the output end of the other Doherty branch, the first output end of the second balun converter is connected with the input end of the first matching network, and the second output end of the second balun converter is grounded.
Optionally, the doherty branch comprises a power splitting unit, a main path amplifying unit, a first processing unit, a second processing unit and a peak path amplifying unit; a first output end of the power dividing unit is connected with one input end of the differential combining module sequentially through the main circuit amplifying unit and the first processing unit, and a second output end of the power dividing unit is connected with one input end of the differential combining module sequentially through the second processing unit and the peak circuit amplifying unit; the power dividing unit is used for performing power distribution processing on the accessed differential signals and outputting main path original signals and peak path original signals; the main path amplifying unit is used for amplifying the main path original signal and outputting a main path amplified signal; the first processing unit is used for carrying out impedance matching and phase shifting processing on the main circuit amplified signal to obtain a main circuit output signal; the second processing unit is used for performing impedance matching and phase shifting processing on the peak path original signal to obtain a peak path processing signal; the peak path amplifying unit is used for amplifying the peak path processing signal and outputting the peak path output signal.
Optionally, the first phase shift parameter of the first processing unit matches the second phase shift parameter of the second processing unit.
Optionally, the first processing unit comprises a first inductor and a first capacitor; the first end of the first inductor is connected to the output end of the main circuit amplifying unit, and the second end of the first inductor is connected to the input end of the differential combiner module and is grounded through the first capacitor unit.
Optionally, the second processing unit comprises a phase shifting network and a second matching network; the input end of the phase shift network is connected with the second output end of the power dividing unit, and the output end of the phase shift network is connected with the input end of the peak path amplifying unit through the second matching network.
Optionally, the doherty branch further comprises a third matching network; the third matching network is connected between the first output end of the power dividing unit and the input end of the main circuit amplifying unit.
Optionally, the doherty branch further comprises a fourth matching network; the fourth matching network is connected between the output end of the peak path amplifying unit and one input end of the differential combining module.
The present application also provides a wireless communication module including any one of the above-described amplifying circuits.
The present application also provides an electronic device including any one of the above-described amplification circuits or any one of the above-described wireless communication modules.
In the amplifying circuit, the wireless communication module and the electronic equipment, the differential conversion module is adopted to carry out differential processing on the initial signals to obtain two paths of differential signals, and then one path of differential signals is amplified by adopting the Doherty branch circuit respectively to obtain each path of initial amplified signals, so that the initial amplified signals are output in sequence such as differential combination and impedance matching, amplified output signals for communication transmission of the corresponding wireless communication module are obtained, the working bandwidth of the whole amplifying circuit can be expanded, and the working performance of the amplifying circuit is improved.
Furthermore, the differential conversion module and the differential combining module respectively adopt corresponding balun converters to realize differential signal processing, so that the working bandwidth can be further expanded.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic diagram of an amplifying circuit according to an embodiment of the present application;
FIG. 2 is a schematic diagram of an amplifying circuit according to another embodiment of the present application;
FIG. 3 is a schematic diagram of an amplifying circuit according to another embodiment of the present application;
FIG. 4 is a schematic diagram of a portion of an amplifying circuit according to an embodiment of the present application;
FIGS. 5a and 5b are schematic diagrams of related network structures according to an embodiment of the present application;
FIG. 6 is a schematic diagram of a portion of an amplifier circuit according to another embodiment of the present application;
FIG. 7 is a schematic diagram of a portion of an amplifier circuit according to another embodiment of the present application;
FIG. 8 is a schematic diagram of an amplifier circuit according to another embodiment of the present application;
fig. 9 is a schematic structural diagram of an amplifying unit according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application are clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. The following embodiments and their technical features may be combined with each other without conflict.
In a first aspect, an amplifying circuit is provided, and as shown in fig. 1, the amplifying circuit includes a differential converting module 210, a differential combining module 220, a first matching network 230, and two doherty branches 100. As shown in fig. 1, the two doherty branches 100 include a doherty branch 100A and another doherty branch 100B, the input end of the differential conversion module 210 is used for accessing an initial signal, the first output end of the differential conversion module 210 is connected to the first input end of the differential combining module 220 through the doherty branch 100A, the second output end of the differential conversion module 210 is connected to the second input end of the differential combining module 220 through the another doherty branch 100B, the output end of the differential combining module 220 is connected to the input end of the first matching network 230, and the output end of the first matching network 230 is used for outputting a signal (i.e., an amplified output signal) amplified by the whole amplifying circuit.
The differential conversion module 210 is configured to perform differential processing on the initial signal to obtain two paths of differential signals, so as to perform amplification processing on each path of differential signal in the following, and thus, the working bandwidth of the amplification circuit can be increased. Alternatively, the differential conversion module 210 may include a balun or other device capable of converting a single-ended signal into two differential signals. Specifically, the amplifying circuit may be disposed in the radio frequency front end module, and the initial signal may be an initial radio frequency signal to be transmitted in the radio frequency front end module where the amplifying circuit is located.
The doherty branch 100 (such as the doherty branch 100A and the doherty branch 100B) is configured to access a differential signal, amplify the accessed differential signal, and output a corresponding initial amplified signal. Optionally, each doherty branch 100 may include a separate doherty power amplifier to amplify the differential signals respectively accessed by the respective branches.
The differential combining module 220 is configured to perform differential combining processing on each path of initial amplified signal to obtain a combined signal. Alternatively, the differential combining module 220 may include a balun or other device capable of converting two differential signals into a single-ended signal.
The first matching network 230 is configured to perform impedance matching processing on the combined signal to output an amplified output signal for communication transmission of a wireless communication module where the amplifying circuit is located, and the impedance matching processing performed by the first matching network 230 can reduce loss in a transmission process of a related signal and improve communication efficiency. Specifically, the first matching network 230 is configured to perform 50 ohm impedance matching on the combined signal, where the matched signal is an amplified output signal finally output by the amplifying circuit. The first matching network 230 may include components such as inductors and capacitors, and parameters of each component may be determined by debugging a parameter debugging method of the matching network.
The amplifying circuit adopts the differential conversion module 210 to perform differential processing on the initial signals to obtain two paths of differential signals, and then adopts one doherty branch 100 to amplify one path of differential signals to obtain each path of initial amplified signals, so that the initial amplified signals of each path are sequentially subjected to output such as differential combining, impedance matching and the like to obtain amplified output signals for communication transmission of the corresponding wireless communication module, the working bandwidth of the whole amplifying circuit can be expanded, and the working performance of the amplifying circuit is improved.
In one embodiment, referring to fig. 2, the differential conversion module 210 includes a first balun converter 211; a first input terminal of the first balun 211 is configured to receive an initial signal, a second input terminal of the first balun 211 is grounded, a first output terminal of the first balun 211 is connected to an input terminal of one doherty branch 100A, and a second output terminal of the first balun 211 is connected to an input terminal of another doherty branch 100B. The first balun 211 is configured to convert the initial signal into two paths of differential signals, and input each path of differential signal into one doherty branch 100.
In this embodiment, the first balun converter 211 is used to perform differential conversion on the initial signal to obtain two paths of differential signals, so that even harmonics can be suppressed, stability in the differential conversion process is provided, and then the doherty branch 100 is used to amplify each path of differential signals, so that the working bandwidth of the whole amplifying circuit can be increased, and the overall amplification performance can be improved.
In one embodiment, referring to fig. 2, the differential combining module 220 includes a second balun 221; a first input of the second balun 221 is connected to the output of one doherty branch 100A, a second input of the second balun 221 is connected to the output of the other doherty branch 100B, a first output of the second balun 221 is connected to the input of the first matching network 230, and a second output of the second balun 221 is grounded.
The second balun 221 is configured to convert the two initial amplified signals into a combined signal.
In this embodiment, the second balun 221 is used to convert the two paths of initial amplified signals into single-ended signals, so as to ensure stability in the differential combining process, simplify the structure of the differential combining module 220, and save the corresponding circuit area. The second balun converter 221 and the first balun converter 211 assist each other, for example, the first balun converter 211 converts the initial signal into two differential signals with a phase difference of 180 degrees, and the second balun converter 221 converts the two initial amplified signals with the corresponding phase difference into one combined signal, so that the reliability in the differential processing process can be further improved.
In one embodiment, referring to fig. 3, each doherty branch 100 includes a power dividing unit 110, a main path amplifying unit 120, a first processing unit 130, a second processing unit 140 and a peak path amplifying unit 150; the first output end of the power dividing unit 110 is connected to one input end of the differential combining module 220 sequentially through the main circuit amplifying unit 120 and the first processing unit 130, for example, the first output end of the power dividing unit 110 is connected to the first input end or the second input end of the second balun converter 221 sequentially through the main circuit amplifying unit 120 and the first processing unit 130, the second output end of the power dividing unit 110 is connected to one input end of the differential combining module 220 sequentially through the second processing unit 140 and the peak circuit amplifying unit 150, for example, the second output end of the power dividing unit 110 is connected to the first input end or the second input end of the second balun converter 221 sequentially through the second processing unit 140 and the peak circuit amplifying unit 150.
The power dividing unit 110 is configured to perform power distribution processing on the accessed differential signal, and output a main path original signal and a peak path original signal. Specifically, the power dividing unit 110 may include a power divider and other components for dividing the initial signal into two signals, i.e., a main signal and a peak signal.
The main path amplifying unit 120 is configured to amplify the main path original signal and output a main path amplified signal. The main-path amplifying unit 120 may include an amplifier, and may also include other structures having an amplifying function.
The first processing unit 130 is configured to perform impedance matching and phase shifting on the main path amplified signal to reduce transmission loss, so as to obtain a main path output signal that can be directly superimposed on a peak path output signal. Alternatively, the first processing unit 130 may include a network having impedance matching and phase shifting functions, such as an LC network.
The second processing unit 140 is configured to perform impedance matching and phase shifting processing on the peak path original signal to reduce transmission loss of the peak path original signal in a subsequent transmission process, so as to obtain a peak path processed signal.
The peak path amplifying unit 150 is configured to amplify the peak path processing signal and output the peak path output signal. The peak amplifying unit 150 may include an amplifier, and may include other structures having an amplifying function.
In this embodiment, each doherty branch 100 is provided with a corresponding doherty power amplifier, which can linearly amplify corresponding differential signals; the first processing unit 130 and the second processing unit 140 can perform impedance matching and phase shifting on the input signal, and can also perform phase shifting on the basis of realizing impedance matching of each branch, and an independent processing network is not required to be arranged for each function, so that the corresponding circuit structure can be simplified, the size of the corresponding amplifying circuit can be controlled, and the occupied area of the amplifying circuit can be reduced.
In one example, the first phase shift parameter of the first processing unit 130 matches the second phase shift parameter of the second processing unit 140, for example, the first phase shift parameter is 90 °, the second phase shift parameter is also 90 °, and so on, so that the phases of the main output signal and the peak output signal are substantially the same, so that the main output signal and the peak output signal can be directly input to one input terminal of the differential combining module 220 by superposition.
In one embodiment, the structure of the second processing unit 140 may be set according to the application scenario of the corresponding amplifying circuit. Optionally, the second processing unit 140 may include at least one LC network to perform phase shift processing and impedance matching on the peak path raw signal through the at least one LC network. Alternatively, the parameters of each LC network in the second processing unit 140 may be determined by debugging the parameters of the relevant LC network.
In an example, referring to fig. 4, fig. 4 is a schematic diagram of a doherty power amplifier structure adopted by one doherty branch 100, where the second processing unit 140 includes a phase shifting network 141 and a second matching network 142; the input end of the phase shift network 141 is connected to the second output end of the power dividing unit 110, and the output end of the phase shift network 141 is connected to the input end of the peak amplifying unit 150 through the second matching network 142. The phase shift network 141 is configured to perform a phase shift processing on the peak path original signal, and the second matching network 142 is configured to perform an impedance matching processing on the peak path original signal after the phase shift processing, so as to obtain a peak path processing signal.
Optionally, the second phase shift parameter includes a sum of the phase shift parameter of the phase shift network 141 and the phase shift parameter of the second matching network 142, and the first phase shift parameter of the first processing unit 130 matches the sum of the phase shift parameter of the phase shift network 141 and the phase shift parameter of the second matching network 142; for example, if the phase shift parameter of phase shift network 141 is 70 ° and the phase shift parameter of second matching network 142 is 20 °, the first phase shift parameter is 90 °.
Optionally, the phase shift network 141 may include a corresponding LC network to implement the phase shift function, for example, as shown in fig. 5a, the phase shift network 141 may include a second inductor L2, a second capacitor C2, and a third capacitor C3, a first end of the second inductor L2 is connected to the second output terminal of the power dividing unit 110, a second end of the second inductor L2 is connected to the input terminal of the second matching network 142, the first end of the second inductor L2 is further grounded through the second capacitor C2, and a second end of the second inductor L2 is further grounded through the third capacitor C3. The parameter values corresponding to the second inductor L2, the second capacitor C2 and the third capacitor C3 can be determined by phase shift requirement and related debugging method.
Optionally, the second matching network 142 may include a corresponding LC network to implement an impedance matching function, for example, as shown in fig. 5b, the second matching network 142 may include a third inductor L3 and a fourth capacitor C4, a first end of the third inductor L3 is connected to the output end of the phase shifting network 141, a second end of the third inductor L3 is connected to the input end of the peaking amplification unit 150, and a second end of the third inductor L3 is further grounded through the fourth capacitor C4. The parameter values corresponding to the third inductor L3 and the fourth capacitor C4 can be determined by debugging through a related debugging method.
In an embodiment, referring to fig. 6, fig. 6 is a schematic diagram of a doherty power amplifier employed by the doherty circuit 100, where the doherty circuit 100 further includes a third matching network 170; the third matching network 170 is connected between the first output terminal of the power dividing unit 110 and the input terminal of the main amplification unit 120. So as to perform impedance matching processing on the signal input to the main path amplification module 120, thereby further improving the signal transmission efficiency of the main path.
In one example, as shown in fig. 6, the doherty branch 100 further comprises a fourth matching network 180; the fourth matching network 180 is connected between the output end of the peak circuit amplifying unit 150 and one input end of the differential combining module 221, so as to perform impedance matching processing on the signal output by the peak circuit amplifying unit 150, obtain a peak circuit output signal, and further improve the signal transmission efficiency of the peak circuit.
Optionally, the third matching network 170 and the fourth matching network 180 may respectively include at least one LC network, so as to respectively perform impedance matching processing on the input signal by using the corresponding LC networks. The network parameters of the third matching network 170 and the fourth matching network 180 can be determined by debugging the relevant network debugging method.
In one embodiment, referring to fig. 7, the first processing unit 130 includes a first inductor L1 and a first capacitor C1; a first end of the first inductor L1 is connected to the output end of the main circuit amplifying unit 120, a second end of the first inductor L1 is connected to one input end of the differential combining module 220, for example, a second end of the first inductor L1 may be connected to a first input end or a second input end of the second balun converter 221, and a second end of the first inductor L1 is further grounded through the first capacitor C1. The parameters corresponding to the first inductor L1 and the first capacitor C1 may be determined according to impedance parameters corresponding to the input end and the output end of the first processing unit 130, respectively. Optionally, the first processing unit 130 may be debugged by using a parameter debugging method of a related LC network, and parameters corresponding to the first inductor L1 and the first capacitor C1 are determined according to network parameters of the first processing unit 130 when the corresponding phase shifting function is satisfied and the transmission characteristic is optimal, so that the first processing unit 130 can accurately perform impedance matching and phase shifting on the main path amplified signal.
Optionally, the parameter debugging method of the first processing unit 130 may include: determining the input impedance of the differential combining module 220, observing the transmission loss of the differential first processing unit 130 according to the input impedance corresponding to the differential combining module 220, and determining the device parameters corresponding to the first inductor L1 and the first capacitor C1 in the first processing unit 130 when the transmission loss of the first processing unit 130 is the lowest.
Alternatively, referring to fig. 7, the fourth matching network 180 includes a fourth inductor L4 and a fifth capacitor C5; a first end of the fourth inductor L4 is connected to the output end of the peak-to-peak amplifying unit 150, a second end of the fourth inductor L4 is connected to one input end of the differential combining module 220, for example, a second end of the fourth inductor L4 may be connected to a first input end or a second input end of the second balun converter 221, and a second end of the fourth inductor L4 is further grounded through a fifth capacitor C5. The parameters corresponding to the fourth inductor L4 and the fifth capacitor C5 may be determined according to impedance parameters corresponding to the input end and the output end of the fourth matching network 180, respectively. Optionally, the fourth matching network 180 may be debugged by using a parameter debugging method of a related LC network, and parameters corresponding to the fourth inductor L4 and the fifth capacitor C5 are determined according to network parameters when the transmission characteristic of the fourth matching network 180 is optimal, so that the fourth matching network 180 can accurately perform impedance matching on the peak circuit amplified signal.
In one embodiment, the main circuit amplifying unit 120 and the peak circuit amplifying unit 150 may select appropriate amplifying components to amplify the accessed signals according to the size characteristics and/or the operating bandwidth requirements of the amplifying circuit, so as to respectively improve the amplifying performance of each path.
In one example, the main path amplifying unit 120 includes a main path amplifier 121 and the peak path amplifying unit 150 includes a peak path amplifier 151 to further simplify the circuit structure. Alternatively, if the power dividing unit 110 includes the power divider 111, the structure of the amplifying circuit may also be as shown in fig. 8. In fig. 8, the relative positions of the 4 amplifiers may be adjusted, two main-circuit amplifiers 121 are disposed on two sides, two peak-circuit amplifiers 151 are disposed on the inner side, the order of the input power dividing structure (power divider 211) is also adjusted accordingly, only one balun converter (i.e., first balun converter 211) is used at the input end, and the area occupied by the whole amplifying circuit can be saved. The amplifying circuit shown in fig. 8 adopts as few balun converters as possible to realize the expansion of the working bandwidth, and can control the area occupied by the amplifying circuit as much as possible on the basis of the expansion of the working bandwidth.
In one example, main path amplifying unit 120 and peak path amplifying unit 150 may also adopt other amplifying structures according to other amplifying requirements. For example, the main circuit amplifying unit 120 and the peak circuit amplifying unit 150 may respectively adopt the amplifying structures shown in fig. 9, so as to respectively improve the working bandwidths of the amplifying units adopted by the main circuit and the peak circuit, suppress even harmonics, and further optimize the performance of the amplifying circuit. As shown in fig. 9, the amplifying structure includes a third balun 322, a first amplifier 323, a second amplifier 324, and a fourth balun 325; a first input end of the third balun converter 322 is an input end of the corresponding amplifying unit, a second input end of the third balun converter 322 is grounded, a first output end of the third balun converter 322 is connected to a first input end of the fourth balun converter 325 through the first amplifier 323, and a second output end of the third balun converter 322 is connected to a second input end of the fourth balun converter 325 through the second amplifier 324; a first output terminal of the fourth balun 325 is an output terminal of the corresponding amplifying unit, and a second output terminal of the fourth balun 325 is grounded.
In the amplifying circuit, the differential conversion module 210 is used for carrying out differential processing on the initial signals to obtain two paths of differential signals, and then one path of differential signals is amplified by one doherty branch 100 to obtain each path of initial amplifying signals, so that the initial amplifying signals are sequentially subjected to output such as differential combining, impedance matching and the like, and amplified output signals for communication transmission of the corresponding wireless communication module are obtained, the working bandwidth of the whole amplifying circuit can be expanded, and the working performance of the amplifying circuit is improved. The differential conversion module 210 and the differential combining module 220 respectively adopt corresponding balun converters 221 to implement differential signal processing, so that the working bandwidth can be further expanded.
The present application further provides a wireless communication module, including any of the above-mentioned embodiments, wherein the working bandwidth of the amplifying circuit is extended, the occupied area is relatively small, and it is helpful to control the size of the corresponding amplifying circuit, thereby controlling the size of the corresponding wireless communication module and optimizing the performance of the wireless communication module. Optionally, the wireless communication module may be used as a radio frequency front end circuit.
The present application further provides an electronic device including the amplifying circuit according to any of the above embodiments or the wireless communication module according to any of the above embodiments. The electronic device may include a wireless communication device such as a wireless router, which has all the advantages of the amplifying circuit described in any of the above embodiments, and details are not repeated herein.
Although the application has been shown and described with respect to one or more implementations, equivalent alterations and modifications will occur to others skilled in the art based upon a reading and understanding of this specification and the annexed drawings. This application is intended to embrace all such modifications and variations and is limited only by the scope of the appended claims. In particular regard to the various functions performed by the above described components, the terms used to describe such components are intended to correspond, unless otherwise indicated, to any component which performs the specified function of the described component (e.g., that is functionally equivalent), even though not structurally equivalent to the disclosed structure which performs the function in the herein illustrated exemplary implementations of the specification.
That is, the above description is only an embodiment of the present application, and not intended to limit the scope of the present application, and all equivalent structures or equivalent flow transformations made by using the contents of the specification and the drawings, such as mutual combination of technical features between various embodiments, or direct or indirect application to other related technical fields, are included in the scope of the present application.
In addition, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
The previous description is provided to enable any person skilled in the art to make and use the present application. In the foregoing description, various details have been set forth for the purpose of explanation. It will be apparent to one of ordinary skill in the art that the present application may be practiced without these specific details. In other instances, well-known processes have not been described in detail so as not to obscure the description of the present application with unnecessary detail. Thus, the present application is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.
Claims (10)
1. An amplification circuit, comprising: the device comprises a differential conversion module, a differential combination module, a first matching network and two Doherty branches;
the input end of the differential conversion module is used for accessing an initial signal, the first output end of the differential conversion module is connected with the first input end of the differential combination module through one doherty branch, the second output end of the differential conversion module is connected with the second input end of the differential combination module through the other doherty branch, and the output end of the differential combination module is connected with the input end of the first matching network;
the differential conversion module is used for carrying out differential processing on the initial signals to obtain two paths of differential signals;
the Doherty branch is used for accessing a path of differential signal, amplifying the differential signal and outputting a corresponding initial amplification signal;
the differential combination module is used for carrying out differential combination processing on each path of initial amplification signal to obtain a combined signal;
the first matching network is used for carrying out impedance matching processing on the combined signal.
2. The amplification circuit of claim 1, wherein the differential conversion module comprises a first balun converter;
the first input end of the first balun converter is used for being connected with an initial signal, the second input end of the first balun converter is grounded, the first output end of the first balun converter is connected with the input end of one Doherty branch, and the second output end of the first balun converter is connected with the input end of the other Doherty branch.
3. The amplification circuit of claim 1, wherein the differential combining block comprises a second balun;
the first input end of the second balun converter is connected with the output end of one Doherty branch, the second input end of the second balun converter is connected with the output end of the other Doherty branch, the first output end of the second balun converter is connected with the input end of the first matching network, and the second output end of the second balun converter is grounded.
4. The amplifying circuit according to claim 1, wherein the doherty branch comprises a power dividing unit, a main path amplifying unit, a first processing unit, a second processing unit and a peak path amplifying unit;
a first output end of the power dividing unit is connected with one input end of the differential combining module sequentially through the main circuit amplifying unit and the first processing unit, and a second output end of the power dividing unit is connected with one input end of the differential combining module sequentially through the second processing unit and the peak circuit amplifying unit;
the power dividing unit is used for performing power distribution processing on the accessed differential signals and outputting main path original signals and peak path original signals;
the main circuit amplifying unit is used for amplifying the main circuit original signal and outputting a main circuit amplified signal;
the first processing unit is used for performing impedance matching and phase shift processing on the main circuit amplified signal to obtain a main circuit output signal;
the second processing unit is used for performing impedance matching and phase shifting processing on the peak path original signal to obtain a peak path processing signal;
the peak path amplifying unit is used for amplifying the peak path processing signal and outputting the peak path output signal.
5. The amplification circuit of claim 4, wherein the first phase shift parameter of the first processing unit matches the second phase shift parameter of the second processing unit;
and/or the first processing unit comprises a first inductor and a first capacitor; the first end of the first inductor is connected with the output end of the main circuit amplifying unit, and the second end of the first inductor is connected with the input end of the differential combining module and is grounded through the first capacitor unit.
6. The amplification circuit of claim 4, wherein the second processing unit comprises a phase shift network and a second matching network;
the input end of the phase shift network is connected with the second output end of the power dividing unit, and the output end of the phase shift network is connected with the input end of the peak path amplifying unit through the second matching network.
7. The amplification circuit of claim 4, wherein the Doherty branch further comprises a third matching network; the third matching network is connected between the first output end of the power dividing unit and the input end of the main circuit amplifying unit.
8. The amplification circuit of claim 4, wherein the Doherty branch further comprises a fourth matching network; the fourth matching network is connected between the output end of the peak circuit amplifying unit and one input end of the differential combination module.
9. A wireless communication module comprising the amplification circuit of any one of claims 1 to 8.
10. An electronic device comprising the amplification circuit of any one of claims 1 to 8 or the wireless communication module of claim 9.
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| CN202211576477.5A CN115940839A (en) | 2022-12-08 | 2022-12-08 | Amplifying circuit, wireless communication module, and electronic device |
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| CN202211576477.5A CN115940839A (en) | 2022-12-08 | 2022-12-08 | Amplifying circuit, wireless communication module, and electronic device |
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| CN114915266A (en) * | 2022-05-11 | 2022-08-16 | 锐石创芯(深圳)科技股份有限公司 | Radio frequency amplifying circuit and radio frequency front end module |
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| US20170077873A1 (en) * | 2015-09-16 | 2017-03-16 | Ampleon Netherlands B.V. | Power Amplifier Cell |
| US20190165739A1 (en) * | 2017-11-27 | 2019-05-30 | Skyworks Solutions, Inc. | Quadrature combined doherty amplifiers |
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